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经营范围
发明名称
BRIDGE PLUG
摘要
申请公布号
GB9300024(D0)
申请公布日期
1993.03.03
申请号
GB19930000024
申请日期
1993.01.04
申请人
PETROLEUM ENG SERVICES
发明人
分类号
E21B33/129
主分类号
E21B33/129
代理机构
代理人
主权项
地址
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